JOHN HOLLOWELL (MD) – Cardiovascular Disease Physician, NPI 1083601520
Cardiovascular Disease Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,430 CARDIOVASCULAR DISEASE (CARDIOLOGY) in TX
Loading map...
Provider Addresses for JOHN HOLLOWELL (MD)
Preston Road, Plano, Collin County, Texas, 75252, United States
PLANO, TX 750242502
Phone: (469) 326-3400
Fax: (469) 326-3499
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 121 Open Payments records for all available years, with a total value of $2,331.
Total Amount is formed as General ($2,331) + Research ($0) + Ownership ($0) = $2,331.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Novartis Pharmaceuticals Corporation ($357).
Total Amount
$2,331
General + Research + Ownership
Payments
121
Total payment records
General Amount
$2,331
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Novartis Pharmaceuticals Corporation | $357 |
| Janssen Pharmaceuticals, Inc | $334 |
| Merck Sharp & Dohme LLC | $306 |
| SCPHARMACEUTICALS INC. | $296 |
| Amgen Inc. | $100 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-03-27
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100327000414 | I | Cardiovascular Disease (Cardiology) | TX | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 1,336 | 913 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 988 | 684 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 528 | 454 | $0 |
| 93793 | Anticoagulant management of patient taking warfarin | 447 | 225 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 376 | 344 | $0 |
Insurance plans in this area (ZIP 75024)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| CARDIOVASCULAR DISEASE (CARDIOLOGY) | TX | 93458 | Insertion of catheter in left heart for imaging of blood vessels or grafts and left lower heart | 25 | 25 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Radiation Oncology | TX | |
| Nurse Practitioner | TX | |
| Internal Medicine | TX | |
| - | TX | |
| - | TX | |
| Clinical Social Worker | TX | |
| - | TX | |
| Nurse Practitioner | TX | |
| Orthopedic Surgery | TX | |
| Clinical Psychologist | TX |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.